Cotton yarn stretching testing device

Abstract

The invention discloses a cotton yarn stretching testing device, and belongs to the technical field of cotton yarn stretching testing devices, the cotton yarn stretching testing device comprises a stretching tester, the upper surface of the stretching tester is fixedly connected with a support frame, and the side surface of the support frame and the upper surface of the stretching tester are provided with clamp pieces; the humidity protection pipe is arranged on the outer surface of the supporting frame, and the outer surface of the supporting frame is fixedly connected with an electric push rod. Meanwhile, cold air can be blown into the sealed protective cover through an air cooler, a cold air pipe, a connecting pipe and an air outlet pipe to create a cold and wet environment, a temperature and humidity sensor can monitor the temperature in the protective cover in real time, and the limitation that a traditional cotton yarn can only be subjected to a stretching test under the dry condition is avoided; it is ensured that the test result is closer to the actual application environment, accurate control over the humidity and temperature of the test environment is achieved, and the stretching test of the cotton yarn under different cold air and humidity climates can be simulated.

Description

Technical Field

[0001] The invention relates to the technical field of cotton yarn tensile testing devices, and more specifically to a cotton yarn tensile testing device. Background Art

[0002] Cotton yarn is a textile raw material made from cotton fibers through a series of processing steps. After processing, the quality and performance of cotton yarn are directly related to the function and durability of the final textile, so it is necessary to perform tensile testing on cotton yarn.

[0003] The existing cotton yarn tensile test usually involves cutting a specified length of yarn from the cotton yarn reel to be tested, then fixing both ends of the cotton yarn in the clamps on the tensile measuring instrument, and then operating the control panel to test the cotton yarn. At the same time, the sensor will monitor and record the changes in the load (force) and elongation of the yarn in real time, and the test results and process will be transmitted to the display screen so that the staff can know and record them.

[0004] With the development of the textile industry, it is particularly important to evaluate the performance of materials under various environmental conditions. The existing cotton yarn tensile testing equipment can only perform tensile tests on cotton yarn in a dry state, but cannot test cotton yarn under different humidity and cold air, resulting in incomplete performance evaluation and certain limitations.

[0005] Therefore, in view of the above technical problems, it is necessary to provide a cotton yarn tensile testing device. Summary of the invention

[0006] The object of the present invention is to provide a cotton yarn tensile testing device to solve the above-mentioned problems.

[0007] In order to achieve the above purpose, the technical solution provided by an embodiment of the present invention is as follows: A cotton yarn tensile testing device, comprising a tensile tester, wherein the upper surface of the tensile tester is fixedly connected to a support frame, and the side surfaces of the support frame and the upper surface of the tensile tester are provided with a clamp; the humidity protection tube is arranged on the outer surface of the support frame, and the outer surface of the support frame is fixedly connected to an electric push rod, and the output shaft ends of the two electric push rods are fixedly connected to a protective cover, and the interiors of the two protective covers are interspersed with water pipes, and one end of the water pipe is fixedly connected to a spray gun; the cold air part is arranged on the outer surface of the protective cover, and the outer surfaces of the two protective covers are fixedly connected to a cold air fan, and the outer surfaces of the two cold air fans are fixedly connected to a cold air pipe, and one end of the cold air pipe is inserted into the interior of the protective cover and fixedly connected to a connecting pipe, and the outer surface of the connecting pipe is provided with a plurality of air outlet pipes, and a matching mobile air guide is movably installed at the opening of the air outlet pipe, and a low temperature promoting part is adsorbed on the outer end of the mobile air guide, and a plurality of uniformly distributed elastic pull strips are fixedly connected between the mobile air guide and the inner wall of the air outlet pipe.

[0008] As a further improvement of the present invention, guide plates are fixedly connected to the inside of the two protective covers, and the guide plates and the spray guns are both inclined, so that the water mist sprayed by the spray gun can be drained so that it all drips into the cotton yarn.

[0009] As a further improvement of the present invention, threading holes are provided inside the two protective covers, and protective members are provided inside the threading holes. The protective members include silicone-coated ring pads fixedly mounted on the inner walls of the threading holes.

[0010] As a further improvement of the present invention, the inner wall of the protective cover is fixedly connected to a temperature and humidity sensor, the outer surfaces of the two protective covers are fixedly connected to a sealing gasket, the interiors of the two protective covers are fixedly connected to a semiconductor cooling plate, and the cooling end of the semiconductor cooling plate faces the inner side of the protective cover, and the heating end faces the outer side of the protective cover; the two connected protective covers can be strengthened by the sealing gasket, and the cooling end of the semiconductor cooling plate faces the inner side of the protective cover, and the heating end faces the outer side of the protective cover; the cooling end of the semiconductor cooling plate can cool the inside of the protective cover to promote the formation of ice on the surface of the moist cotton yarn.

[0011] As a further improvement of the present invention, the two protective covers are made of transparent acrylic glass so that the staff can directly observe the specific conditions of the cotton yarn through the protective covers. The outer surface of the protective cover is fixedly connected with an insulation layer to help maintain a stable cold and wet state inside the protective cover.

[0012] As a further improvement of the present invention, a waste recovery component is arranged inside the two protective covers, and the waste recovery component includes a waste pipe opened inside the two protective covers, and one end of the two waste pipes is fixedly connected to a recovery box to recycle the waste in the protective covers.

[0013] As a further improvement of the present invention, two exhaust fans are fixedly connected to the upper surface of the tensile tester, and an exhaust pipe is provided on the outer surface of the exhaust fan. The other end of the exhaust pipe is fixedly connected to the outer surface of the recycling box, so that the waste and water in the protective cover can be directly pumped into the recycling box through the exhaust fan.

[0014] As a further improvement of the present invention, a foam insulation core is arranged on the outer surface of the silicone resin coated ring pad, and a sponge pad is fixedly connected to the outer surface of the foam insulation core.

[0015] As a further improvement of the present invention, the movable air guide member includes a hollow hemispherical cover, a positioning groove is opened at the center of the interior of the hollow hemispherical cover, and a magnetic suction sheet is fixedly connected to the interior of the positioning groove. The low-temperature promoting member can be temporarily fixed through the cooperation of the magnetic suction sheet and the positioning groove, so that the low-temperature promoting member can be replaced and supplemented later.

[0016] As a further improvement of the present invention, the low-temperature promoting part includes a filling hemisphere and a cooling hemisphere symmetrically distributed, the outer end of the filling hemisphere is fixedly connected to a magnetic block adsorbed to the magnetic sheet, the filling hemisphere is made of lightweight material and is non-planar at one end close to the cooling hemisphere, the cooling hemisphere is made of a mixture of saltpeter powder and an adhesive, the filling hemisphere plays a role in fixing the cooling hemisphere and reducing the mass as much as possible to facilitate movement under the action of wind, the magnetic block can be inserted into the magnetic sheet and adsorbed and fixed to the positioning groove, the cooling hemisphere can press the cotton yarn tightly when the movable air guide part moves outward under the action of wind, to prevent it from shaking under the action of wind, causing water to fall off quickly and fail to freeze, and at the same time, the magnetic block can dissolve in the water on the surface of the cotton yarn, and quickly absorb a large amount of heat to achieve significant cooling, so that the wet cotton yarn can quickly freeze and enter the test state.

[0017] Compared with the prior art, the advantages of the present invention are: This scheme can simulate the anti-stretching effect of cotton yarn in a low temperature environment or even in a freezing state. Specifically, when air is discharged from the air outlet pipe, the wind force can push the movable air guide to move outward until it contacts the cotton yarn and is pressed against it to a certain extent. The spherical structure of the movable air guide can guide the cold air to the surrounding side to avoid blowing directly onto the cotton yarn, causing significant shaking and affecting the freezing of water. The cold air can flow in the internal environment to drive the overall temperature to drop. At this time, after the low-temperature component is pressed against the cotton yarn, the cooling hemisphere can dissolve in the water and quickly absorb a large amount of heat to achieve significant cooling, causing the water to quickly freeze on the cotton yarn to form test conditions, and then the tensile test is initiated by the fixture, thereby simulating the anti-stretching effect of cotton yarn in an extreme freezing environment.

[0018] This solution uses the cooperation of a water pipe, a spray gun and a guide plate to evenly spray water mist onto the cotton yarn. At the same time, the cold air can be blown into the sealed protective cover through the cold air fan, cold air duct, connecting pipe and air outlet duct to create a cold and humid environment. The thermal insulation layer effectively slows down the exchange of ambient heat, helping to maintain a stable cold and humid state inside the protective cover. At the same time, the temperature and humidity sensor can monitor the temperature inside the protective cover in real time, avoiding the limitation that traditional cotton yarn can only be tensile tested under dry conditions, ensuring that the test results are closer to the actual application environment, improving the practicability and accuracy of the test, and realizing precise control of the humidity and temperature of the test environment.

[0019] By using semiconductor refrigeration sheets to freeze cotton yarn, the cotton yarn can be subjected to tensile tests under extreme cold and wet conditions (including freezing conditions). This can simulate tensile tests of cotton yarn in different cold wind and humidity climates in order to evaluate its performance and durability under actual conditions.

[0020] This solution can pump cotton yarn waste into a recycling box for storage through the cooperation of the exhaust fan, the exhaust pipe and the waste pipe, so as to quickly complete the cleaning and recycling of the waste, keep the test environment clean and tidy and the subsequent tests proceed smoothly, reduce manual intervention, improve work efficiency and safety, avoid the potential interference of residual substances on subsequent test results, and ensure the accuracy and comparability of test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a side view of the overall structure of the present invention; Figure 3 It is a partial structural cross-sectional view of the whole of the present invention; Figure 4 It is a schematic structural diagram of the protective cover of the present invention; Figure 5 It is a partial structural cross-sectional view of the protective cover of the present invention; Figure 6 It is a partial structural cross-sectional view of the protective element of the present invention; Figure 7 It is a partial structural cross-sectional view of the air outlet pipe of the present invention; Figure 8 It is a partial structural cross-sectional view of the movable air guide member and the low temperature promoting member of the present invention.

[0022] Description of the numbers in the figure: 1. Tensile tester; 2. Support frame; 3. Fixture; 4. Humidity protection tube; 401. Protective cover; 402. Water pipe; 403. Electric push rod; 404. Spray gun; 405. Guide plate; 5. Cold air parts; 501. Cooling fan; 502. Cold air pipe; 503. Air outlet pipe; 504. Connecting pipe; 6. Threading hole; 7. Protective parts; 701. Resin coated pad; 702. Sponge pad; 703. Foam insulation core; 8. Temperature and humidity sensor Sensor; 9, waste recycling parts; 901, waste pipe; 902, recycling box; 903, exhaust fan; 904, exhaust pipe; 10, sponge ball; 11, insulation layer; 12, semiconductor refrigeration plate; 13, movable air guide; 1301, hollow hemispherical cover; 1302, magnetic sheet; 1303, positioning groove; 14, low temperature promoting part; 1401, filling hemisphere; 1402, cooling hemisphere; 1403, magnetic block; 15, elastic pull strip. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0024] The first implementation method:

[0025] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A cotton yarn tensile testing device comprises a tensile testing instrument 1, a support frame 2 is fixedly connected to the upper surface of the tensile testing instrument 1, and a clamp 3 is arranged on the side of the support frame 2 and the upper surface of the tensile testing instrument 1; Specifically, the humidity protection tube 4 is arranged on the outer surface of the support frame 2, and the outer surface of the support frame 2 is fixedly connected with an electric push rod 403, the output shaft ends of the two electric push rods 403 are fixedly connected with a protective cover 401, the insides of the two protective covers 401 are interspersed with water pipes 402, one end of the water pipe 402 is fixedly connected with a spray gun 404, the cold air component 5 is arranged on the outer surface of the protective cover 401, the outer surfaces of the two protective covers 401 are fixedly connected with a cold air fan 501, the outer surfaces of the two cold air fans 501 are fixedly connected with a cold air pipe 502, one end of the cold air pipe 502 is inserted into the inside of the protective cover 401 and is fixedly connected with a connecting pipe 504, and the outer surface of the connecting pipe 504 is provided with a plurality of air outlet pipes 503; The two protective covers 401 are internally fixedly connected with a guide plate 405; the outer surface of the silicone resin coated ring pad 701 is provided with a foam insulation core 703, and the outer surface of the foam insulation core 703 is fixedly connected with a sponge pad 702; the two protective covers 401 are internally fixedly connected with a semiconductor cooling plate 12, and the cooling end of the semiconductor cooling plate 12 faces the inner side of the protective cover 401, and the heating end faces the outer side of the protective cover 401; Furthermore, the two electric push rods 403 are started to drive the protective cover 401 to move, so that the two protective covers 401 are connected to each other and the sealing gasket 10 can enhance the sealing of the protective cover 401 to prevent gas and liquid leakage, and the water pipe 402 is connected to the water source, so that water enters the spray gun 404 through the water pipe 402 and is evenly sprayed on the cotton yarn. The guide plate 405 is used to ensure that the water mist is evenly distributed. At the same time, the cold air fan 501 is started to work, and the cold air enters the connecting pipe 504 through the cold air pipe 502, and finally blows into the protective cover 401 through the air outlet pipe 503 to create a cold and humid environment. The temperature in the protective cover 401 can be monitored in real time by the temperature and humidity sensor 8, thereby realizing precise control of the humidity and temperature of the test environment. The cotton yarn is placed in different low temperature environments by the semiconductor refrigeration sheet 12, so that the cotton yarn can be tensile tested under extreme cold and humid conditions, avoiding the limitation that traditional cotton yarn can only be tensile tested under dry conditions.

[0026] The second implementation method:

[0027] Reference Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , which is the second embodiment of the present invention. This embodiment is based on the previous embodiment. The upper surface of the tensile tester 1 is fixedly connected with a support frame 2. The side of the support frame 2 and the upper surface of the tensile tester 1 are provided with a clamp 3. The humidity protection tube 4 is provided on the outer surface of the support frame 2. The outer surface of the support frame 2 is fixedly connected with an electric push rod 403. The output shaft ends of the two electric push rods 403 are fixedly connected with a protective cover 401. Specifically, the two protective covers 401 are provided with waste recovery parts 9, the waste recovery parts 9 include waste pipes 901 opened in the two protective covers 401, one end of the two waste pipes 901 is fixedly connected to a recovery box 902, the upper surface of the tensile tester 1 is fixedly connected to two exhaust fans 903, the outer surface of the exhaust fan 903 is provided with an exhaust pipe 904, the other end of the exhaust pipe 904 is fixedly connected to the outer surface of the recovery box 902, the inner wall of the protective cover 401 is fixedly connected to the temperature and humidity sensor 8, and the outer surfaces of the two protective covers 401 are fixedly connected to the sealing gasket 10; Furthermore, by releasing the clamp 3, the sample is separated from the clamp and naturally falls to the bottom of the protective cover 401, and then the exhaust fan 903 is started. The negative pressure generated by the exhaust pipe 904 is used to efficiently suck the cotton yarn waste and moisture remaining in the protective cover 401 into the recycling box 902 through the waste pipe 901, so that the waste cleaning and recycling work can be completed quickly, keeping the test environment clean and tidy and the subsequent tests smooth.

[0028] See also Figure 7-8 A matching mobile air guide member 13 is movably installed at the opening of the air outlet pipe 503, and a low-temperature promoting member 14 is adsorbed on the outer end of the mobile air guide member 13. A plurality of evenly distributed elastic pull strips 15 are fixedly connected between the mobile air guide member 13 and the inner wall of the air outlet pipe 503. The mobile air guide member 13 includes a hollow hemispherical cover 1301, and a positioning groove 1303 is opened at the center of the hollow hemispherical cover 1301. A magnetic suction piece 1302 is fixedly connected to the positioning groove 1303. The cooperation between the magnetic suction piece 1302 and the positioning groove 1303 can make the low-temperature promoting member 14 temporarily fixed, so that the low-temperature promoting member 14 can be replaced and supplemented later.

[0029] The low temperature promoting member 14 includes a symmetrically distributed filling hemisphere 1401 and a cooling hemisphere 1402. The outer end of the filling hemisphere 1401 is fixedly connected with a magnetic block 1403 adsorbed to the magnetic sheet 1302. The filling hemisphere 1401 is made of a lightweight material and is non-planar at one end close to the cooling hemisphere 1402. The cooling hemisphere 1402 is made of a mixture of saltpeter powder and an adhesive. The filling hemisphere 1401 plays a role in fixing the cooling hemisphere 1402 and reducing the mass as much as possible to facilitate movement under the action of wind. The magnetic block 1403 can be inserted into the magnetic sheet 1302 and adsorbed and fixed to the positioning groove 1303. The cooling hemisphere 1402 can press the cotton yarn tightly when the movable air guide member 13 moves outward under the action of wind, to prevent it from shaking under the action of wind, causing water to fall off quickly and fail to freeze. At the same time, the cooling hemisphere 1402 can be dissolved in the water on the surface of the cotton yarn, and quickly absorb a large amount of heat to achieve significant cooling, so that the wet cotton yarn can quickly freeze and enter the test state.

[0030] The working principle of the present invention is as follows: align the two ends of the cotton yarn with the clamping member 3, so that the clamping member 3 fixes and clamps the ends of the cotton yarn, and then, start the two electric push rods 403 to drive the protective cover 401 to move, so that the two protective covers 401 are clamped together and the sealing gasket 10 can enhance the sealing performance of the clamping of the protective cover 401 to prevent gas and liquid leakage, so that the cotton yarn is fixed in the protective cover 401 through the threading hole 6, and the protective member 7 on the surface of the threading hole 6 can play a sealing role to prevent the external environment from interfering with the internal cold and wet conditions. , ensure the consistency of temperature environment, improve test accuracy, further improve the sealing of protective cover 401, so as to effectively adjust the temperature around the cotton yarn and keep it constant. The friction damage of the cotton yarn during the stretching process can be reduced by sponge pad 702. At this time, connect the water pipe 402 with the water source, so that the water enters the spray gun 404 through the water pipe 402 and is evenly sprayed on the cotton yarn. The guide plate 405 is used to ensure that the water mist is evenly distributed. At the same time, the cooling fan 501 is started to work, and the cold air passes through the cold air pipe 502. The air enters the connecting pipe 504 and is finally blown into the protective cover 401 through the air outlet pipe 503 to create a cold and humid environment. The heat preservation layer 11 effectively slows down the exchange of environmental heat, helping the inside of the protective cover 401 to maintain a stable cold and humid state. The temperature inside the protective cover 401 can be monitored in real time through the temperature and humidity sensor 8, thereby realizing accurate control of the humidity and temperature of the test environment. When the air outlet pipe 503 blows out air, the wind force can push the movable air guide 13 to move outward until it contacts the cotton yarn and is pressed against it to a certain extent. The spherical structure of the dynamic air guide 13 can guide the cold wind to the surrounding side to avoid blowing directly onto the cotton yarn, causing significant shaking and affecting the freezing of water. The cold wind can flow in the internal environment to drive the overall temperature to drop. At this time, after the low-temperature promoting component 14 is pressed against the cotton yarn, the cooling hemisphere 1402 can dissolve in the water and quickly absorb a large amount of heat to achieve significant cooling, causing the water to freeze quickly on the cotton yarn to form test conditions, and then the tensile test is started by the clamp 3, thereby simulating the anti-tensile effect of the cotton yarn in an extreme icing environment.

[0031] The purpose of using this method to cool down and cause water to freeze on the cotton yarn is that, on the one hand, the saltpeter directly contacts the water on the cotton yarn and will not scatter, thereby minimizing consumption and waste while not easily polluting the environment. At the same time, it can be pressed against the cotton yarn to maintain a relatively stable state for freezing. Secondly, the cooling hemisphere 1402 can be easily replaced and replenished after consumption. Finally, this contact method can be beneficial for controlling the dissolution amount of the cooling hemisphere 1402. If further cooling is required, the wind force is maintained or increased so that the cooling hemisphere 1402 continues to contact the cotton yarn for dissolution and heat absorption. If the temperature drops to a specified value, the wind force can be reduced to separate the low-temperature promoting component 14 from the cotton yarn. Compared with the method of using a semiconductor refrigeration sheet alone to cool down, this embodiment uses the dissolution and heat absorption characteristics of the cooling hemisphere 1402 to achieve the purpose of rapid cooling to freezing conditions, thereby effectively improving the test efficiency. The semiconductor refrigeration sheet has limited cooling effect in actual use. When testing under extreme low temperatures and freezing conditions, the cooling rate is too slow. Therefore, this method can be used to achieve rapid cooling to extremely low temperatures.

[0032] After the cotton yarn tensile test is completed, the clamp 3 is released to allow the sample to detach from the clamp and naturally fall to the bottom of the protective cover 401. The exhaust fan 903 is then started, and the negative pressure generated by the exhaust pipe 904 is used to efficiently suck the cotton yarn waste and moisture remaining in the protective cover 401 into the recycling box 902 through the waste pipe 901, so that the waste cleaning and recycling work can be completed quickly, the test environment can be kept clean and the subsequent tests can be carried out smoothly, the potential interference of residual substances on the subsequent test results can be avoided, and the accuracy and comparability of the test data can be ensured.

[0033] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0034] In addition, it should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that those skilled in the art can understand.

Claims

1. A cotton yarn tensile testing device, characterized in that: include: A tensile tester (1), wherein the upper surface of the tensile tester (1) is fixedly connected to a support frame (2), and the support frame (2), the side surface of the support frame (2) and the upper surface of the tensile tester (1) are provided with a clamp (3); A humidity protection tube (4), the humidity protection tube (4) being arranged on the outer surface of the support frame (2), the outer surface of the support frame (2) being fixedly connected to electric push rods (403), the output shaft ends of two electric push rods (403) being fixedly connected to protective covers (401), the interiors of the two protective covers (401) being interspersed with water pipes (402), one end of the water pipe (402) being fixedly connected to a spray gun (404); A cold air component (5), wherein the cold air component (5) is arranged on the outer surface of the protective cover (401), the outer surfaces of the two protective covers (401) are fixedly connected to cold air machines (501), the outer surfaces of the two cold air machines (501) are fixedly connected to cold air pipes (502), one end of the cold air pipe (502) is inserted into the interior of the protective cover (401) and is fixedly connected to a connecting pipe (504), the outer surface of the connecting pipe (504) is provided with a plurality of air outlet pipes (503), a matching movable air guide component (13) is movably installed at the opening of the air outlet pipe (503), a low temperature promoting component (14) is adsorbed on the outer end of the movable air guide component (13), and a plurality of evenly distributed elastic pull strips (15) are fixedly connected between the movable air guide component (13) and the inner wall of the air outlet pipe (503).

2. A cotton yarn tensile testing device according to claim 1, characterized in that: The two protective covers (401) are internally fixedly connected with guide plates (405), and the guide plates (405) and the spray guns (404) are both arranged at an inclination.

3. A cotton yarn tensile testing device according to claim 1, characterized in that: A threading hole (6) is provided inside the two protective covers (401), and a protective member (7) is provided inside the threading hole (6). The protective member (7) comprises a silicone-coated ring pad (701) fixedly mounted on the inner wall of the threading hole (6).

4. A cotton yarn tensile testing device according to claim 1, characterized in that: The inner wall of the protective cover (401) is fixedly connected to a temperature and humidity sensor (8), the outer surfaces of the two protective covers (401) are fixedly connected to a sealing gasket (10), the interiors of the two protective covers (401) are fixedly connected to a semiconductor cooling plate (12), and the cooling end of the semiconductor cooling plate (12) faces the inside of the protective cover (401), and the heating end faces the outside of the protective cover (401).

5. A cotton yarn tensile testing device according to claim 1, characterized in that: The two protective covers (401) are made of transparent acrylic glass, and the outer surfaces of the protective covers (401) are fixedly connected with a heat-insulating layer (11).

6. A cotton yarn tensile testing device according to claim 1, characterized in that: A waste recovery component (9) is arranged inside the two protective covers (401), and the waste recovery component (9) comprises a waste pipe (901) opened inside the two protective covers (401), and one end of the two waste pipes (901) is fixedly connected to a recovery box (902).

7. A cotton yarn tensile testing device according to claim 6, characterized in that: Two exhaust fans (903) are fixedly connected to the upper surface of the tensile tester (1); an exhaust pipe (904) is provided on the outer surface of the exhaust fan (903); and the other end of the exhaust pipe (904) is fixedly connected to the outer surface of the recovery box (902).

8. A cotton yarn tensile testing device according to claim 3, characterized in that: The outer surface of the silicone-coated ring pad (701) is provided with a foam insulation core (703), and the outer surface of the foam insulation core (703) is fixedly connected with a sponge pad (702).

9. A cotton yarn tensile testing device according to claim 1, characterized in that: The movable air guide member (13) comprises a hollow hemispherical cover (1301), a positioning groove (1303) is provided at the inner center of the hollow hemispherical cover (1301), and a magnetic attraction sheet (1302) is fixedly connected inside the positioning groove (1303).

10. A cotton yarn tensile testing device according to claim 9, characterized in that: The low-temperature promoting component (14) comprises a symmetrically distributed filling hemisphere (1401) and a cooling hemisphere (1402); the outer end of the filling hemisphere (1401) is fixedly connected to a magnetic block (1403) that is attracted to the magnetic sheet (1302); the filling hemisphere (1401) is made of a lightweight material and has a non-planar shape at one end close to the cooling hemisphere (1402); and the cooling hemisphere (1402) is made of a mixture of saltpeter powder and an adhesive.

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